Dynamic sql insert for exporting excel into sqlserver using php?

I have been exporting excel file to database using php. Which is working properly but now I want dynamic insert sql query where I Do

not want to specify column name and column numbers please help me on
the same I have done enough research and I am unable to come up with a
solution for the same I am sharing my code too please help me

<?php
session_start();
$serverName = "192.168.22.68"; //serverNameinstanceName
$connectionInfo = array( "Database"=>"INTEROPDB", "UID"=>"uatkrasqluser", "PWD"=>"CV!u@t2018");
$conn = sqlsrv_connect( $serverName, $connectionInfo);

if($conn) {
  
  

}else{
 echo "Connection could not be established.<br />";
    die( print_r( sqlsrv_errors(), true));
}


require 'vendor/autoload.php';

use PhpOfficePhpSpreadsheetSpreadsheet;
use PhpOfficePhpSpreadsheetWriterXlsx;

if(isset($_POST['save_excel_data']))
{
    $fileName = $_FILES['import_file']['name'];
    $file_ext = pathinfo($fileName, PATHINFO_EXTENSION);

    $allowed_ext = ['xls','csv','xlsx'];

    if(in_array($file_ext, $allowed_ext))
    {
        $inputFileNamePath = $_FILES['import_file']['tmp_name'];
        $spreadsheet = PhpOfficePhpSpreadsheetIOFactory::load($inputFileNamePath);
        $data = $spreadsheet->getActiveSheet()->toArray();

        $count = "0";
        foreach($data as $row)
        {
            if($count > 0)
            {
                $fullname = $row['0'];
                $email = $row['1'];
                $phone = $row['2'];
                $course = $row['3'];

                $studentQuery = "INSERT INTO PRIYATIWARI (fullname,email,phone,course) VALUES

(‘$fullname’,’$email’,’$phone’,’$course’)”;
$result = sqlsrv_query($conn, $studentQuery);
$msg = true;
}
else
{
$count = “1”;
}
}

        if(isset($msg))
        {
            $_SESSION['message'] = "Successfully Imported";
            header('Location: index.php');
            exit(0);
        }
        else
        {
            $_SESSION['message'] = "Not Imported";
            header('Location: index.php');
            exit(0);
        }
    }
    else
    {
        $_SESSION['message'] = "Invalid File";
        header('Location: index.php');
        exit(0);
    }
}
?>

IN place of insert tablename(column name), values() I want something dynamic where I do not need to specify column name